How to keep aspect ration of Image and Watermark in Laravel php

I am trying to add Watermark of 800x100px to Images which can have any resolution greater than 800x100, i.e. 801x110, 1200x1000, 1300x200, 1920x1080, 4000x2010, etc.

I want to keep the aspect ratio of Watermark and image to 2:50. i.e., if image has 1000px width, then watarmark over image should occupy 20px(1000/50).

Here is my Function :

in helper.php

use Image;
//calling from Controller

public static function addwatermark ($name) {
  $thumbnail = Image::make($name);
  $watermarkSource = 'public/img/watermark/watermark.png';
  $thumbnail->insert($watermarkSource, 'bottom-left', 0, 0);
  $thumbnail->save($name)->destroy();
}

in ImageController.php

 $folder = 'public/folder/';
 $large = 'myfile.jpeg';
 Helper::addwatermark($folder.$large);

source https://stackoverflow.com/questions/68604977/how-to-keep-aspect-ration-of-image-and-watermark-in-laravel-php

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